From 8dc28549c210c5546551684c2dae65a36bf7d13f Mon Sep 17 00:00:00 2001
From: Prem Sichanugrist <psichanugrist@thoughtbot.com>
Date: Thu, 14 Jun 2012 12:16:29 -0400
Subject: [PATCH] Use existential operator

---
 lms/static/coffee/src/modules/video/video_player.coffee | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lms/static/coffee/src/modules/video/video_player.coffee b/lms/static/coffee/src/modules/video/video_player.coffee
index 0dd52a128b..20df378267 100644
--- a/lms/static/coffee/src/modules/video/video_player.coffee
+++ b/lms/static/coffee/src/modules/video/video_player.coffee
@@ -135,7 +135,7 @@ class @VideoPlayer
     @video.speed
 
   volume: (value) ->
-    if value != undefined
+    if value?
       @player.setVolume value
     else
       @player.getVolume()